Series two will be a slightly shorter run of four episodes, which will air in 2013.

Emma Rigby, Polly Walker, Pippa Haywood, Natalie Gavin, Jonas Armstrong and Adam Gillen starred in the South Yorkshire-based drama about four women coping without their partners, who are all in prison.

The first run ended earlier this year with over 5 million viewers for the sixth episode.

Its first series was highly praised by critics, with The Guardian describing the show as a "thrusting character-driven piece with a cast you can't take your eyes off".